Author: Site Editor Publish Time: 2021-04-19 Origin: Site
Ningbo Saintking has many printing forms, such as offset printing, silk screen printing, gravure printing, thermal transfer and water transfer printing. The following is a brief description of Ningbo Saintking on thermal transfer and water transfer.
Thermal transfer printing is a technique in which patterns and patterns are printed on heat-resistant adhesive paper, and the patterns and patterns of the ink layer are printed on finished materials by heating and pressing. Even for multi-color patterns, since the transfer operation is only a process, customers can shorten the pattern printing operation and reduce the loss of materials (finished products) caused by printing errors. Using thermal transfer film printing, multi-color patterns can be formed at one time, without color registration, and simple equipment can also print realistic patterns.
Thermal transfer equipment is used to decorate aluminum profiles and various metal plates, which can achieve the effect of wood products or marble. The heat transfer equipment works according to the principle of sublimation. It can quickly transfer the required wood grain or marble grain to the surface of the aluminum powder coating within 3-5 minutes and can penetrate into the interior of the coating 40-60 Micrometers.
Aluminum transfer production process:
1: Use a film machine to cut the thermal transfer film to the required size.
2: Use the transfer ultrasonic packaging machine to weld the cut transfer film into a workpiece packaging bag according to the size of the workpiece by ultrasonic welding.
3: Insert the work piece package bag made of transfer film on the packaging platform.
4: Put the work piece wrapped with the transfer film on the platform of the thermal transfer machine trolley, and place 18 aluminum materials in turn, connect the vacuum taps to both ends of the aluminum materials and lock them, turn on the vacuum switch, and the transfer film is tight at this time Close to the aluminum material. The trolley automatically sends the aluminum material into the baking furnace, the baking furnace automatically heats up to 220 degrees and keeps it for 3 minutes, and the trolley automatically exits the baking furnace.
5: Loosen the vacuum tap and remove the workpiece.
6: Remove the transfer film and check the quality of the workpiece.
Lithographic heat transfer production process:
1: Use a film cutting machine to cut the thermal transfer paper roll to the required size.
2: Attach the thermal transfer paper film to the surface of the workpiece and place it on the flat thermal printer.
3: Push the plate to the heating zone of the plate heat transfer machine, press the pressure plate switch, the pressure plate will tightly press the heat transfer paper on the workpiece, heat and keep it warm for one minute.
4: Raise the pressure plate, push the workpiece to the segment, remove the transfer film, remove the workpiece and check.
Thermal transfer technology is widely used in electrical appliances, daily necessities, building materials and decoration. Due to its corrosion resistance, impact resistance, aging resistance, abrasion resistance, fire resistance, and no color change for 15 years in outdoor use, almost all products use labels made in this way. For example, when you open the phone case, you can see densely packed labels with barcodes inside. Many labels require that they can withstand the test of time, are not deformed or faded for a long time, cannot be worn due to contact with solvents, and cannot be deformed or discolored due to high temperature. Therefore, it is necessary to use a special material printing medium and printing material to ensure these characteristics. Inkjet and laser printing technologies are unattainable.
Water transfer printing is known as a relatively environmentally friendly technology, and it is also the most emerging high-efficiency printing production. It is probably related to his departure from the ink in the printing process.
There are two types of water transfer technology, one is water mark transfer technology, and the other is water coating transfer technology. The former mainly completes the transfer of text and photo patterns, while the latter tends to complete the entire surface of the product. The transfer printing technology uses a water-soluble film that is easily dissolved in water to carry graphics and text. Because the water coating film has excellent tension, it is easy to wrap around the surface of the product to form a graphic layer, and the surface of the product has a completely different appearance like spray paint. Covering transfer technology can cover color patterns on workpieces of any shape, solving the problem of three-dimensional product printing for manufacturers. The curved surface coating can also add different textures, such as leather texture, wood texture, jade texture, and marble texture, on the surface of the product, and at the same time, it can also avoid the vacant position that often appears in general board printing. And in the printing process, since the product surface does not need to be in contact with the printing film, damage to the product surface and its integrity can be avoided.
Water transfer uses water pressure and activator to dissolve and transfer the peeling layer on the water transfer carrier film. The basic process is:
1: Film printing: various patterns are printed on the polymer film;
2: Spray primer: many materials must be coated with a layer of adhesive, such as metal, ceramics, etc., if you want to transfer different patterns, you must use different background colors, such as wood grain basically use brown, coffee, khaki, etc. The stone grain is basically white, etc.;
3: Film extension: let the film lay flat on the water, and wait for the film to stretch and level;
4: Activation: Use a special solvent (activator) to activate the pattern of the transfer film into an ink state;
5: Transfer: Use water pressure to print the activated pattern on the printed object;
6: Washing with water: Wash the remaining impurities of the printed workpiece with water;
7: Drying: Dry the printed workpiece, the temperature depends on the quality and melting point of the material;
8: Spray paint: spray transparent protective paint to protect the surface of the printed object;
9: Drying: Dry the surface of the object after spraying the topcoat.
The difference between water transfer and thermal transfer is:
Water transfer printing technology is a kind of printing that uses water pressure to hydrolyze transfer paper and plastic film with color patterns on polymer;
Thermal transfer is achieved by thermal transfer by thermal sol or thermal transfer coating absorbing sublimation ink.
Comparison of advantages and disadvantages of water transfer and thermal transfer:
Advantages of water transfer printing: It can be done without any investment in equipment, and can be done on many surfaces that are not resistant to high temperatures and a little curved. No need to coat the watch first. Disadvantages: The transfer effect is too poor, and it is actually just a layer of image film attached. Material costs and labor costs are extremely high;
Advantages of thermal transfer: good transfer effect, very beautiful, low cost of labor and materials, fast production speed and high efficiency. Disadvantages: The product needs to be resistant to high temperatures and can only be transferred on the regular surface.